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How much gas in the tank?

Igor Frolov
Igor Frolov
March 17, 2015
How much gas in the tank?

We are accustomed to designate the amount of a substance in certain units. So, gas is usually measured in kilograms, liters or cubic meters. For the storage of gas used special containers - cylinders. They come in various sizes. But how do you know how much gas fits into a cylinder of a certain volume, taking into account that different gases have different densities? In this article we will tell you how much gas in a cylinder of a certain volume can fit.

The cylinder is a pressurized vessel made from seamless metal steel pipes. They are used for the storage and transportation of gases under pressure, as well as gases in a liquefied or dissolved state. Cylinders are always fitted with a valve or valve to control the volume of gas released and injected.

The following gases can be transported and stored in them:

  • compressed: argon, helium, oxygen, hydrogen, nitrogen, air, carbon dioxide, propane, etc .;
  • liquefied: ammonia, butane, nitrous oxide, butylene, freon, isobutylene, sulfurous anhydride, hydrogen sulfide, chlorine, ethylene, etc .;
  • dissolved in liquids: acetylene.

How much liquefied gas in the tank?

Despite the fact that cylinders can have different sizes, they are divided into certain groups depending on the volume:

  • from 5 to 12 liters - can hold no more than 2 kg of liquefied gases;
  • from 12 to 27 liters - holds no more than 3.3 kg of liquefied gases;
  • from 27 to 30 liters - holds no more than 11.4 kg of liquefied gases;
  • from 30 and more - holds no more than 21.1 kg of liquefied gases.

How much compressed gas can there be?

It is much more difficult to calculate the amount of compressed gas in the cylinder, since here, among other things, it is necessary to take into account the pressure.

Below are data on the main, most common types of technical gases, filled into cylinders under normal conditions, according to the pressure set by GOST:

  • oxygen: 40 liters - 6.3 cubic meters - 8.3 kg;
  • nitrogen: 40 liters - 5.7 cubic meters - 7.5 kg;
  • Argon: 40 liters - 6.3 cubic meters - 7.5 kg;
  • carbon dioxide: 40 liters - 6.0 cubic meters - 20-24 kg;
  • propane: 50 liters - 9.5 cubic meters - 21.5 kg;
  • helium: 40 liters - 5.7 cubic meters - 1 kg.

Dissolved gas

Acetylene is widely used in various welding machines, as well as for the manufacture of acetic acid, ethyl alcohol, solvents, aromatic hydrocarbons, etc.

Due to the fact that this substance has the ability to explosive self-decomposition under high pressure, it is usually mixed with various liquids for transportation, mainlywith organic solvents. The resulting solution is much less explosive. Acetylene is prohibited by law to use under pressure above 1.5 atm.

So, for example, with acetone, at an ambient temperature of 15 ° C and at normal atmospheric pressure, acetylene is mixed at the rate of 1 liter of acetone to 23 liter of acetylene.

  • Acetylene: 40 liters - 5.3 cubic meters - 5 kg.

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